{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{c}}
\hline\hline
                    &\multicolumn{1}{c}{\specialcell{\;Distance \\ HH-WS (m)}}&\multicolumn{1}{c}{\specialcell{\;\;\;Distance \\ HH-WS (min)}}&\multicolumn{1}{c}{\specialcell{Observed \\ \; storage}}&\multicolumn{1}{c}{\specialcell{Reported \\ \; storage}}\\\cmidrule(lr){2-2}\cmidrule(lr){3-3}\cmidrule(lr){4-4}\cmidrule(lr){5-5}
                    &\multicolumn{1}{c}{(1)}   &\multicolumn{1}{c}{(2)}   &\multicolumn{1}{c}{(3)}   &\multicolumn{1}{c}{(4)}   \\
\hline
Treated             &      -0.147   &       0.065** &       0.002   &       0.003   \\
                    &     (1.041)   &     (0.027)   &     (0.028)   &     (0.032)   \\
Constant            &      -2.801***&       0.012   &      -0.134***&      -0.040   \\
                    &     (0.685)   &     (0.024)   &     (0.024)   &     (0.029)   \\
\hline
p-value (analytical)&        0.89   &        0.02   &        0.95   &        0.93   \\
p-value (RBI)       &        0.93   &        0.02   &        0.95   &        0.92   \\
Mean at baseline    &       31.40   &        0.81   &        0.73   &        0.76   \\
R$^2$               &        0.01   &        0.01   &        0.02   &        0.02   \\
N                   &        5832   &        5729   &        6050   &        6051   \\
\hline\hline
\end{tabular}
}
